GLADWYNE (AP) — Officials say an apparent gas explosion leveled an empty mansion in an affluent suburb of Philadelphia, reducing the 9,000-square-foot home to rubble.

Authorities said the explosion at the Gladwyne, Montgomery County, mansion happened just after 8 p.m. Sunday night. The house was undergoing extensive renovations. Officials said no one was inside the home at the time of the explosion, and the family was staying in a second residence when the mansion exploded.

A spokeswoman for PECO Energy Co. said no injuries were reported.

Neighbor Peter Cooke said he heard the explosion suddenly, with his son Michael Cooke comparing it to a meteor strike. The explosion was heard in parts of southern New Jersey.

The fire marshal and the Bureau of Alcohol, Tobacco, Firearms and Explosives are investigating.